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INSTALLATION (continued)
1 --- 5
Do not manually operate the transfer switch
until both power sources are disconnected:
open both circuit breakers.
Table C . Maintenance handle positions on 150–1200 amp. transfer switches. .
Transfer Switch
Position
J–design 150---600 A
Interlocked Shafts
1
Link between co ntact
shafts prevents cl osi ng
both N & E contacts
H–design 800---1200 A
Interlocked Weights
2
Lobes prevent
closing both N & E
contacts
Maintenance
Handle
Shaft Indicators
N
o
r
m
a
l
E
t
t
h
f
t
hub
l
o
b
e
l
o
b
e
weight
hub
up
E=O
uppercontactsopen
N
orma
l
N
link
contact sha
f
ts
hub
l
o
b
e
l
o
b
e
weight
hub
up
N=C
lowercontactsclosed
Load
E
up
E=O
uppercontactsopen
L
o
a
d
Disconnected
N
down
N=O
lowercontactsopen
E
m
e
r
g
e
n
c
y
E
down
E=C
upper contactsclosed
E
mergency
N
down
N=O
lowercontactsopen
Note 1: The hub and contact shaft turn in opposi te directions through a cam follo wer mechanism.
Note 2: The hub and contact shaft turn in the same directions.
Note: If Normal and Emergency connectio ns are reversed this operatio n is also reversed.